Apparatus for treating concrete and like plastic materials



Jan. 15, 1935. c. JACKSON 1,988,316

APPARATUS FOR TREATING CONCRETE AND LIKE PLASTIC MATERIALS Filed July24, 1933 2 SheetS Sheet 1 h U: Q

[NVENTOR A TTORNE YS C. JACKSON Jan. 15, 1935.

APPARATUS FOR TREATING CONCRETE AND LIKE PLASTIC MATERIALS 2Sheets-Sheet 2 /NVENTOR 60mm z ATTORNEYS F J W Patented Jan. 15, 19351,988,316 manarvs roa mama conoaa'ra LIKE PLASTIC MATERIAL CorwlllJackson, Ludington, Mich. Application July 24, 1983, Serial No. 681,901

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This invention relates to apparatus for treating concrete and likeplastic materials of the typeillustrated in my application for LettersPatent filed September 6, 1932, Serial No. 631,806, and is an adaptationof and in some respects an improvement upon the structure thereillustrated and claimed.

The main objects of this invention are:

First, to provide an apparatus for treating concrete and likematerials-for example, the placing of large masses of concrete as inwalls, dams and various other situations which is of very largecapacity, and capable of easy and rapid manipulation. v

Second, to provide an apparatus for treating and placing concrete orlike plastic materials which enables the efl'ective'placing of concreteof such low water content as would be dimcult or impossible to place bythe usual tamping methods.

Third, to provide an apparatus for treating and placing concrete havingthese advantages which may be manipulated with a relatively small amountof labor and in which the operating parts are effectively housed, thedriving motor being positioned to balance the structure for highlyeffective action and so that, in use, its weight is largely supportedduring various manipulations by the material treated.

Objects pertaining to details and economies of my invention will appearfrom the description to follow. The invention is defined in the claims.

A structure which embodies the features of my invention is illustratedin the accompanying drawings, in which:

Fig. 1 is a perspective view of a commercial embodiment of my inventionwhich has been found highly satisfactory.

Fig. 2 is a fragmentary side elevation with the casing partially brokenaway and partially in longitudinal section.

Fig. 3 is a cross section on line 33 of Fig. 2.

Fig. 4 is a side elevation of a modified form or embodiment of myinvention, the rotor shaft and its unbalancing weights and bearings forthe shaft being indicated by dotted lines.

Figs. 5, 6 and '7 are views illustrating the method of using theapparatus and the action thereof in use under working conditions such asillustrated, the views showing successive stages of operation.

My device or apparatus in the commercial embodiment illustrated in Figs.1, 2 and 3 and 5, 6 and 7 comprises an elongated cylindrical motorhousing 1, at least of such diameter as to receive a motor, preferablyan electric motor designated The housing is of uniform diameter from end,to end except that its ends are rounded, its lower end terminating inthe longitudinally disposed blades or fins 4, these blades beingdisposed in angular crossed relation to each other. The housing is notonly designed to enclose and house the motor but to be inserted orembedded into a mass of concrete or other plastic material to be treatedand is closed or sealed to protect the parts therein.

The rotor of the motor is provided with a shaft 5 extending at each endof the motor and supported at the ends of the shaft and at the ends ofthe housing in bearings 6, these bearings being mounted or carried bythe walls of the housing. The shaft is provided with unbalancing weights7 disposed adjacent these bearings 6.

I also provide the shaft with bearings 8 disposed adjacent the ends ofthe motor and carried by the disk-like supports 9 fitting the walls ofthe housing so that the shaft is directly supported at this point by thewalls of the housing. The housing is, with this arrangement, uniformlyvibrated from end to end and in a plane transverse to the axis of theshaft.

The rod-like handle 10, preferably tubular to serve as a conduit for theelectrical cable 11, is disposed axially of the shaft and connected tothe housing by a tubular resilient connection 12, this connection beingpreferably that shown in my said application for patent and is notdetailed herein. This handle is provided with an outer D-grip 13 at itsend and an inner transverse grip bar 14, this grip bar being preferablytransversely offset from the longitudinal plane of the handle tofacilitate grasping.

This tool which is illustrated is designed to be manipulated by twoworkmen.

A switch box 15 is disposed on the handle between the grips.

In Fig. 5, I illustrate a mass of concrete designated generally by thenumeral 16, this being shown in a pile such as results from being dumpedfrom a conveyor'bucket. The tool is' shown partially embedded in themass and the upper part of the mass indicated at 17 as subject tovibrations, the lines of the vibrations being indicated by the wavyhorizontal lines.

In Fig. 6, the housing is shown further sub-.

merged or embedded and an attempt'has been made to illustrate its actionin the same way, and in Fig. 7, the casing is shown completely submergedin the concrete mass.

In practice, it has been found that with a dry unworkable concrete mix;that is, a concrete mixture of such low water content as to be commonlyregarded as unworkable or in accordance with the method disclosed in myUnited States Letters Patent No. 1,787,449, issued January 6, 1931, afour cubic yard batch may be reduced to the condition indicated in Fig.7 in about three minutes, the vibrations being effective in a circle ofabout ten feet in diameter and to the depth of the casing which, in thecommercial structure illustrated, is about three feet.

The device may be manipulated with a minimum of labor on the part of theoperators and is highly efllcient for the placing of concrete innumerous relations, it being of considerably larger capacity than thestructure illustrated in my said application for Letters Patent butbeing heavier and commonly requiring two men to manipulate,

the present structure being particularly well adapted for placingconcrete in dams or other placements where large volumes are to beplaced. The arrangement of the motor within the housing serves toeffectively balance the vibrations and also provides a balancedstructure for handling. The submerging of the housing serves toefiectively cool the motor so that ventilation is not required.

. In the embodiment of my invention shown in Fig. 4, the housing 18 isdesigned to receive the motor at its upper'end, a shaft bearing 19 beingprovided at the lower end of the housing and a bearing 20 adjacent thelower end of the motor. The shaft 21 has unbalancing weights 22 adjacentthese bearings. The handle 23 is a cross handle provided with grips 24at each end.

The structure shown in Figs. 1 to 3 is, however, the preferredconstruction.

I have not attempted to illustrate or describe other adaptations orembodiments of my invention as it is believed that this disclosure willenable those skilled in the art to which my invention relates to embodyor adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is: v

1. An apparatus for treating concrete and like plastic materialscomprising an elongated cylindrical motor housing adapted to be insertedinto a body of plastic material, bearings at the ends of said housing,an electric motor disposed centrally within said housing, the rotor ofwhich is provided with a shaft projecting at both ends of the motor andsupported at its ends by said bearings, said shaft being provided withunbalancing weights disposed adjacent said bearings, bearing supportsdisposed within said housing at each end of the motor and in supportingengagement with the walls of the housing, said supports being providedwith bearings for said shaft, a handle disposed axially relative to saidshaft and having a resilient connection to said housing and having anouter grip at its upper end, and

an inner grip disposed transversely of said handle in spaced relation tosaid outer grip and in transversely ofiset relation to the handle.

2. An apparatus for treating concrete and like plastic materialscomprising an elongated cylindrical motor housing adapted to be insertedinto a body of plastic material, bearings at the ends of said housing,an electric motor disposed centrally within said housing, the rotor ofwhich is provided with a shaft projecting at both ends of ings, saidshaft being provided with unbalancing weights disposed adjacent saidbearings, bearing supports disposed within said housing at each end ofthe motor and in supporting engagement with the walls of the housing,said supports being provided with bearings for said shaft, and a handledisposed axially relative to said shaft and having a resilientconnection to said housing.

3. An apparatus for treating concrete and like plastic materials,comprising an elongated cylindrical motor housing adapted to be insertedinto a body of plastic material, bearings within said housing, anelectric motor disposed centrally within said housing, the rotor ofwhich is provided with a shaft projecting at both ends of the motor andsupported at its ends by said bearings, said shaft being provided withunbalancing weights disposed adjacent said bearings, a handle disposedaxially relative to said shaft and having a resilient connection to saidhousing and having an outer grip at its upper end, and an inner gripdisposed transversely of said handle in spaced relation to said outergrip and in transversely offset relation to the handle.

4. An apparatus for treating concrete and like plastic materialscomprising an elongated cylindrical motor housing adapted to be insertedinto a body of plastic material, bearings within said housing, anelectric motor disposed centrally within said housing, the rotor ofwhich is provided with a shaft projecting at both ends of the motor andsupported at its ends by said bearings, said shaft being provided withunbalancing weights disposed adjacent said bearings, and a handledisposed axially relative to said shaft and having a resilientconnection to said housing.

5. An apparatus for treating concrete and like plastic materialscomprising an elongated motor housing adapted to be inserted into a bodyof plastic material, bearings at the ends of said housing, a motordisposed centrally within said housing and having a rotor provided witha shaft projecting at both ends of the motor and supported by saidbearings, said shaft being provided with unbalancing weights at bothsides of the motor, a bearing at each end of the motor and havingsupports in supporting engagement with the walls of the housing, ahandle disposed axially relative to said shaft and having resilientconnection to said housing and having an outer grip at its upper end,and an inner grip disposed in spaced relation to said outer grip.

6. An apparatus for treating concrete and like plastic materialscomprising an elongated motor housing adapted to be inserted into a bodyof plastic material, bearings at the ends of said housing, a motordisposed centrally within said housing and having a rotor provided witha shaft projecting at both ends of the motor and supported by saidbearings, said shaft being provided with unbalancing weights at bothsides of the motor, a bearing at each end of the motor and havingsupports in supporting engagement with the walls of the housing, and ahandle for manipulating said housing attached to the upper end thereof.

7. An apparatus for treating concrete and like plastic materialscomprising an elongated motor housing adapted to be inserted into a bodyof plastic material, bearings within said housing, a motor disposedcentrally within said housing and having a rotor provided with a shaftprojecting at both ends of the motor and supported by said bearings,said shaft being provided with unbalancing weights at both sides of themotor, a handle disposed axially relative to said shaft and I havingresilient connection to said housing and having an outer grip at itsupper end, and an inner grip disposed in spaced relation to said outergrip.

8. An apparatus for treating concrete and like plastic materialscomprising; an elongated motor housing adapted to be inserted into abody of plastic material, bearings within said housing, a motor disposedcentrally within said housing and having a rotor provided with a shaftprojecting at both ends of the motor and supported by said bearings,said shaft being provided with unbalancing weights at both sides of themotor, and a handle for manipulating said housing attached to the upperend thereof.

9. An apparatus for treating concrete and like plastic materialscomprising a motor provided with a rotor, a closed elongated housingadapted to be inserted into a body of plastic material, a shaft for saidrotor provided with bearings at the ends of the housing, said shaftbeing provided with unbalancing weights disposed adjacent said bearings,and a handle disposed axially relative to said shaft and havingresilient connection to said housing.

10. An apparatus for treating concrete and like plastic materialscomprising a motor provided with a rotor, a closed elongated housingadapted to be inserted into a body of plastic material, a shaft for saidrotor provided with bearings at the ends of the housing, said shaftbeing provided with unbalancing weights disposed adjacent said bearings,and a handle for manipulating said housing.

11. An apparatus for treating concrete and like plastic materialscomprising a motor provided with a rotor, a closed elongated housingadapted to be inserted into a body of plastic material, said motor beingdisposed centrally of said housing, a shaft for said rotor provided withbearings at both sides of the motor, said shaft being provided with anunbalanc weight at each side of the motor, and a handle disposed axiallyrelative to said shaft and having an outer grip at its end and an innergrip disposed transversely of the handle and spaced from the outer grip.

12. An apparatus for treating concrete and like plastic materialscomprising a motor provided with a rotor, a closed elongated housingadapted to be inserted into a body of plastic material, said motor beingdisposed centrally of said housing, a shaft for said rotor provided withbearings at both sides of the motor, said shaft being provided with anunbalancing weight at each side of the motor, and a handle formanipulating said housing.

13. An apparatus for treating concrete and like plastic materialscomprising a motor provided with a rotor, a closed elongated housing forsaid motor adapted to be inserted into a body of plastic material, ashaft for said rotor provided with bearings adjacent the ends of thehousing, said shaft being provided with unbalancing weights disposedadJacent said bearings, a handle disposed axially relative to said shaftand having resilient connection to said housing, an outer grip at theend of the handle, and a transversely disposed inner grip.

14. An apparatus for treating concrete and like plastic materialscomprising a motor provided with a rotor, a closed elongated housing forsaid motor adapted to be inserted into a body of plastic material, ashaft for said rotor provided with end thereof.

CORWILL JACKSON.

bearings adjacent the ends of the housing, said

